// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"(?s)(?<!<pre>)\R(?!</pre>)(?=((?!<pre>).)*</pre>)").unwrap();
let string = "<div>
test
test
test
</div>
<pre>
Line one
Line two
Line three
Line four
Line five
Line six
</pre>";
let substitution = "<br />";
// result will be a String with the substituted value
let result = regex.replace_all(string, substitution);
println!("{}", result);
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/